#include <stdio.h>

int main(int argc, char* argv[]) {
    const double PI = 3.1415926;
    double r = 1.0;
    
    int i = 9527;
    int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

    printf("Area = %lf\n", PI * r *r);
    return 0;
}
